Functionalized α,α-dibromo esters through Claisen rearrangements of dibromoketene acetals

Org Lett. 2015 Feb 20;17(4):1054-7. doi: 10.1021/acs.orglett.5b00209. Epub 2015 Feb 11.

Abstract

Allylic alcohols can be transformed into γ,δ-unsaturated α,α-dibromo esters through a two-step process: formation of a bromal-derived mixed acetal, followed by tandem dehydrobromination/Claisen rearrangement. The scope and selectivity of both steps have been investigated. The product α,α-dibromo esters were subjected to various carbon-carbon bond-forming reactions, oxidations, and lactonizations.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Acetals / chemistry*
  • Esters
  • Ethylenes / chemistry*
  • Hydrocarbons, Brominated / chemical synthesis*
  • Hydrocarbons, Brominated / chemistry
  • Ketones / chemistry*
  • Molecular Structure
  • Propanols / chemistry*
  • Stereoisomerism

Substances

  • Acetals
  • Esters
  • Ethylenes
  • Hydrocarbons, Brominated
  • Ketones
  • Propanols
  • allyl alcohol
  • ketene